Just downloaded the latest version via GitHub and I noticed the 1.5.7 specific admin folder only has one file, packingslip.php
1.5.6 has edits on attributes_controller.php, invoice.php, and orders.php.

Is this the only core file edit required for 1.5.7?

1.5.7 specific includes folder only has edits for templates, and yet 1.5.6 had an edit in modules/YOUR_TEMPLATE/attributes.php
Is this no longer required?

As well as the above queries, having installed the module, I'm getting the following log file generated when viewing products_with _attributes_stock page in admin.

PHP Fatal error: 1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '))' at line 1 :: select count(distinct p.products_id) as total FROM products p, products_description pd WHERE pd.language_id=1 AND p.products_id = pd.products_id AND (p.products_id IN ( )) ==> (as called by) /Users/developer/Sites/localhost/mysite/myadmin/includes/classes/split_page_results.php on line 39

It looks like it's missing part of the query.